S.T.I. Thread Plug Gages

Helical coil ( STI ) Plug Gages are used to gage threaded holes prior to insertion of screw thread inserts. Screw thread inserts are used to repair a damaged thread or to provide stronger thread assembly. All Helical Coil ‐ STI thread plug gages are manufactured of oil hardened tool steel to a class X tolerance. Class W tolerance thread plug gages priced on request.

SKU Description Size Go Length NoGo Length Pitch Diameter Each
STI-7/16-20-2B-GO 7/16-20 UNF 2B STI Go Plug-Class X 7/167/81/2.4700"
$51.00
STI-7/16-20-2B-NGO 7/16-20 UNF 2B STI NoGo Plug-Class X 7/167/81/2.4744"
$51.00
STI-7/16-20-2B-D/E 7/16-20 UNF 2B STI Go/NoGo Thread Plug Gage w/handle-Class X 7/167/81/2.4700" - .4744"
$114.00
STI-7/16-20-3B-GO 7/16-20 UNF 3B STI Go Plug-Class X 7/167/81/2.4700"
$51.00
STI-7/16-20-3B-NGO 7/16-20 UNF 3B STI NoGo Plug-Class X 7/167/81/2.4731"
$51.00
STI-7/16-20-3B-D/E 7/16-20 UNF 3B STI Go/NoGo Thread Plug Gage w/handle-Class X 7/167/81/2.4700" - .4731"
$114.00
STI-1/2-13-2B-GO 1/2-13 UNC 2B STI Go Plug-Class X 1/27/81/2.5499"
$54.00
STI-1/2-13-2B-NGO 1/2-13 UNC 2B STI NoGo Plug-Class X 1/27/81/2.5554"
$54.00
STI-1/2-13-2B-D/E 1/2-13 UNC 2B STI Go/NoGo Thread Plug Gage w/handle-Class X 1/27/81/2.5499" - .5554"
$120.00
STI-1/2-13-3B-GO 1/2-13 UNC 3B STI Go Plug-Class X 1/27/81/2.5499"
$54.00
STI-1/2-13-3B-NGO 1/2-13 UNC 3B STI NoGo Plug-Class X 1/27/81/2.5537"
$54.00
STI-1/2-13-3B-D/E 1/2-13 UNC 3B STI Go/NoGo Thread Plug Gage w/handle-Class X 1/27/81/2.5499" - .5537"
$120.00
STI-1/2-20-2B-GO 1/2-20 UNF 2B STI Go Plug-Class X 1/27/81/2.5325"
$54.00
STI-1/2-20-2B-NGO 1/2-20 UNF 2B STI NoGo Plug-Class X 1/27/81/2.5371"
$54.00
STI-1/2-20-2B-D/E 1/2-20 UNF 2B STI Go/NoGo Thread Plug Gage w/handle-Class X 1/27/81/2.5325" - .5371"
$120.00
STI-1/2-20-3B-GO 1/2-20 UNF 3B STI Go Plug-Class X 1/27/81/2.5325"
$54.00
STI-1/2-20-3B-NGO 1/2-20 UNF 3B STI NoGo Plug-Class X 1/27/81/2.5357"
$54.00
STI-1/2-20-3B-D/E 1/2-20 UNF 3B STI Go/NoGo Thread Plug Gage w/handle-Class X 1/27/81/2.5325" - .5357"
$120.00
STI-9/16-12-2B-GO 9/16-12 UNC 2B STI Go Plug-Class X 9/167/81/2.6167"
$61.00
STI-9/16-12-2B-NGO 9/16-12 UNC 2B STI NoGo Plug-Class X 9/167/81/2.6225"
$61.00
STI-9/16-12-2B-D/E 9/16-12 UNC 2B STI Go/NoGo Thread Plug Gage w/handle-Class X 9/167/81/2.6167" - .6225"
$135.00
STI-9/16-12-3B-GO 9/16-12 UNC 3B STI Go Plug-Class X 9/167/81/2.6167"
$61.00
STI-9/16-12-3B-NGO 9/16-12 UNC 3B STI NoGo Plug-Class X 9/167/81/2.6208"
$61.00
STI-9/16-12-3B-D/E 9/16-12 UNC 3B STI Go/NoGo Thread Plug Gage w/handle-Class X 9/167/81/2.6167" - .6208"
$135.00
STI-9/16-18-2B-GO 9/16-18 UNF 2B STI Go Plug-Class X 9/167/81/2.5986"
$61.00
STI-9/16-18-2B-NGO 9/16-18 UNF 2B STI NoGo Plug-Class X 9/167/81/2.6035"
$61.00
STI-9/16-18-2B-D/E 9/16-18 UNF 2B STI Go/NoGo Thread Plug Gage w/handle-Class X 9/167/81/2.5986" - .6035"
$135.00
STI-9/16-18-3B-GO 9/16-18 UNF 3B STI Go Plug-Class X 9/167/81/2.5986"
$61.00
STI-9/16-18-3B-NGO 9/16-18 UNF 3B STI NoGo Plug-Class X 9/167/81/2.6020"
$61.00
STI-9/16-18-3B-D/E 9/16-18 UNF 3B STI Go/NoGo Thread Plug Gage w/handle-Class X 9/167/81/2.5986" - .6020"
$135.00
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